<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>P51 5.2.1 对象的定义</title>
</head>
<body>
    <script>
        var o1={};
        var o2={name:'Jim'};
        var o3={name:'Jim',age:19,gendar:'男'};
        var o4={
            name:'Jim',
            age:19,
            gendar:'男',
            sayHello:function(){
                console.log('你好');
            }
        }
    </script>
 
</body>
</html>